Appolo Heating is proud of our industry affiliations and certifications from the leaders in the HVAC industry. Below are a few of the memberships and certifications that we currently hold. Lennox Premier Dealer At Lennox, we are dedicated to delivering the highest possible levels of reliability. As a testament to this commitment, you’ll find the Good Housekeeping Seal on most Lennox® products. As one of the most widely recognized symbols of consumer quality assurance, the Good Housekeeping Seal adds to Lennox’s reputation as a name you can trust. Good Housekeeping The Good Housekeeping Seal is issued by the Good Housekeeping Research Institute, the product-evaluation test laboratory of Good Housekeeping magazine. All Seal-bearing products are backed by the magazine’s two-year limited warranty* for replacement or refund if defective.